TY - RPRT TI - Critical evaluation of data in the physical sciences--a status report on the National Standard Reference Data System, June 1970. David R. Lide, Jr., editor. AU - Lide, David R. PY - 1970 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 553 DO - 10.6028/NBS.TN.553 ER -